The MRCOOL Signature Series multi-position air handler is the indoor half of a Signature central split system, in seven sizes from 1.5 to 5 tons on R-454B refrigerant. A copper A-coil with aluminum fins and a blower moving 749 to 1,549 CFM sit in a cabinet that installs upflow, downflow or horizontal in either direction, with an R-454B leak sensor built in.
It suits a closet, basement, attic or crawl space install and pairs with a Signature cooling-only or heat pump condenser of the same capacity. Installation is by a licensed HVAC contractor.
Features
Four Installation Positions
Installs upflow, downflow, horizontal left or horizontal right, with horizontal right as the factory configuration.
Copper A-Coil
A copper coil with aluminum fins handles heat transfer and moisture removal, metered by a fixed piston sized to the matching condenser.
ECM Blower from 2.5 Tons
The 2.5 to 5-ton sizes use an ECM blower motor; the 1.5 and 2-ton sizes use a PSC motor. Rated airflow runs from 749 to 1,549 CFM.
Refrigerant Leak Sensor
An R-454B leak sensor is built into the cabinet and can be moved to suit the chosen installation position.
Reusable Filter
The filter slides in behind a removable cover and can be vacuumed or rinsed.
Heat Kit Ready
Optional 5kW, 7.5kW and 10kW electric heat kits mount inside the cabinet.
Works with Most Thermostats
Connects to most third-party thermostats and HVAC controls rather than a proprietary system.
Specifications
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Voltage: 208/230V
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Phase: 1
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Frequency: 60 Hz
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Refrigerant: R-454B
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Liquid Line: 3/8"
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Metering Device: Orifice
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Filter: Washable, behind a removable cover
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Works With: Signature Series Top Discharge Condensers
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ENERGY STAR: No
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AHRI Certified: Yes
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UL Listed: Yes
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ETL Listed: Yes
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CSA Listed: Yes
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Color: Grey
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Installation Positions: Upflow, downflow, horizontal left, horizontal right
18,000 BTU
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Model: MCAEAMPSF18C21AA
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Nominal Tonnage: 1.5 ton
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Minimum Circuit Ampacity: 2.1 A
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Max Fuse / Breaker: 3 A
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Sound Level: 53 dBA
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Airflow: 749 CFM
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Suction Line: 3/4"
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Blower Motor: PSC
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Filter Size: 18.1" x 21.4" (up to 1" thick)
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Dimensions: 19.62"W x 22"D x 45.75"H
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Weight: 120 lbs
24,000 BTU
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Model: MCAEAMPSF24C21AA
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Nominal Tonnage: 2 ton
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Minimum Circuit Ampacity: 2.4 A
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Max Fuse / Breaker: 3 A
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Sound Level: 53 dBA
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Airflow: 761 CFM
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Suction Line: 3/4"
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Blower Motor: PSC
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Filter Size: 18.1" x 21.4" (up to 1" thick)
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Dimensions: 19.62"W x 22"D x 45.75"H
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Weight: 128 lbs
30,000 BTU
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Model: MCAEAMPEF30C21AA
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Nominal Tonnage: 2.5 ton
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Minimum Circuit Ampacity: 4.5 A
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Max Fuse / Breaker: 6 A
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Sound Level: 53 dBA
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Airflow: 983 CFM
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Suction Line: 3/4"
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Blower Motor: ECM
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Filter Size: 18.1" x 21.4" (up to 1" thick)
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Dimensions: 19.62"W x 22"D x 45.75"H
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Weight: 129 lbs
36,000 BTU
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Model: MCAEAMPEF36C21AA
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Nominal Tonnage: 3 ton
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Minimum Circuit Ampacity: 4.5 A
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Max Fuse / Breaker: 6 A
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Sound Level: 55 dBA
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Airflow: 1,131 CFM
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Suction Line: 3/4"
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Blower Motor: ECM
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Filter Size: 18.1" x 21.4" (up to 1" thick)
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Dimensions: 19.62"W x 22"D x 45.75"H
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Weight: 129 lbs
42,000 BTU
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Model: MCAEAMPEF42C21AA
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Nominal Tonnage: 3.5 ton
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Minimum Circuit Ampacity: 7.2 A
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Max Fuse / Breaker: 10 A
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Sound Level: 54 dBA
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Airflow: 1,254 CFM
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Suction Line: 3/4"
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Blower Motor: ECM
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Filter Size: 18.1" x 21.4" (up to 1" thick)
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Dimensions: 19.62"W x 22"D x 45.75"H
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Weight: 131 lbs
48,000 BTU
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Model: MCAEAMPEF48E21AA
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Nominal Tonnage: 4 ton
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Minimum Circuit Ampacity: 7.2 A
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Max Fuse / Breaker: 10 A
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Sound Level: 57 dBA
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Airflow: 1,549 CFM
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Suction Line: 7/8"
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Blower Motor: ECM
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Filter Size: 20.5" x 23.8" (up to 1" thick)
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Dimensions: 22"W x 24.5"D x 53.12"H
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Weight: 163 lbs
60,000 BTU
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Model: MCAEAMPEF60E21AA
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Nominal Tonnage: 5 ton
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Minimum Circuit Ampacity: 7.2 A
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Max Fuse / Breaker: 10 A
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Sound Level: 57 dBA
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Airflow: 1,549 CFM
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Suction Line: 7/8"
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Blower Motor: ECM
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Filter Size: 20.5" x 23.8" (up to 1" thick)
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Dimensions: 22"W x 24.5"D x 53.12"H
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Weight: 170 lbs
What's Included
- MRCOOL Signature Series multi-position air handler with R-454B refrigerant leak sensor
- Accessory parts bag with drain plugs and piston fittings
- Installation and user manual
Installation
Professional installation required. This equipment must be installed by a licensed HVAC contractor (EPA Section 608-certified for any refrigerant work), following MRCOOL's installation manual and all local codes, permits and licensing rules. MRCOOL's limited warranty applies only to units installed that way, and it does not cover installation labor.
Pairs with the Signature Series cooling-only or heat pump condenser of the same capacity. The coil ships without a refrigerant charge and uses a fixed piston; MRCOOL's manual lists the piston for each condenser size. Refrigerant connections are 3/8" liquid with 3/4" suction (1.5 to 3.5 tons) or 7/8" suction (4 and 5 tons). Primary and auxiliary condensate drains are 3/4"; trap the primary drain and pitch lines at least 1/8" per foot. Keep at least 25" clear in front for filter and coil service. Cabinets are 19.62" W x 22" D x 45.75" H (1.5 to 3.5 tons) or 22" W x 24.5" D x 53.12" H (4 and 5 tons). Power is 208/230V single phase; circuit sizes, including with a heat kit, are in the installation manual.
Resources
Shipping, Returns & Warranty
Ships to addresses in the United States only, by freight carrier for the larger cartons. Shipping cost is calculated at checkout, and the carrier may call ahead to book a delivery window.
Inspect the packaging and the product before you sign. Note any damage or shortage on the delivery receipt, then email photos to support@mycleansupplies.com within 48 hours of delivery so the freight claim can be filed. Damage reported after 48 hours can't be claimed.
MRCOOL handles returns through the store you bought from, so your return comes to us. Unopened, unused MRCOOL equipment can be returned within 21 days of delivery with a return authorization from us. You pay the return shipping, and a restocking fee of up to 20% may be deducted along with payment processing fees. Opened, installed or used equipment and special-order items can't be returned.
MRCOOL's limited warranty gives the original owner 10 years on parts, counted from the proof of purchase date. It covers replacement parts only, not labor, and it requires purchase from an authorized dealer, installation that follows all applicable codes, permits and licensing, and a matched, approved Signature condenser. Full terms, registration steps and exclusions are in the MRCOOL warranty document under Resources.
Warranty claims. MRCOOL handles warranty claims directly through support.mrcool.com or (270) 366-0457. Some MRCOOL warranties cover the original purchaser only. Systems that aren't DIY need a valid installation invoice to open a claim.
About MRCOOL
MRCOOL designs heating, cooling and water-heating equipment from its home base in Hickory, Kentucky. The range runs from DIY ductless mini-splits, built around MRCOOL's patented pre-charged Quick Connect line sets, through contractor-installed mini-splits, central split systems, packaged units and gas furnaces, to HeatWise water heaters and CoolBlade HVLS fans for warehouses and shops.
The Signature Series is MRCOOL's single-stage central split line on R-454B: cooling-only and heat pump condensers from 1.5 to 5 tons, matched indoors by this multi-position air handler at every size and by a wall-hung stud-mount air handler from 1.5 to 3 tons. Condensers and air handlers are sold separately, and the variable-speed TruInverter models sit above them in the Signature range.